Logging In

Interaction with the supercomputer is typically performed with command line
tools. The command line tools can be run via a command prompt, also known
as a shell. SSH is used to establish a secure shell with the supercomputer.

Users should log in via the hostname ssh.fsl.byu.edu.

Programs can be tested from the interactive nodes, but anything left running
for more than an hour will be killed automatically. Read the
Slurm documentation when you are
ready to run your jobs.

Windows

Windows does not have SSH capabilities built-in. Download
PuTTY
or Bitvise Tunnelier.
Enter hostname: ssh.fsl.byu.edu. Click connect and enter your
username and password when prompted. Once connected you can run commands.

Linux / Mac OS

Linux and Mac OS have SSH built-in. The terminal can usually be found in
one of three locations: Applications -> Utilities,
Applications -> Accessories, or
Applications -> System Tools. This opens a command prompt on
the local system; you can now connect to ssh.fsl.byu.edu. Run

$ ssh yourusername@ssh.fsl.byu.edu

Common Command Line Tools

If you're new to using a shell, take the time to go through our
Unix tutorial.

These percentages only report the utilization of the hardware. Current utilization is not necessarily
indicative of how long your jobs may wait to run.

Some jobs are preemptable and may be evicted the moment you submit new jobs. Others jobs
may be nearing completion and you might only have to wait a few minutes. Or maybe
the queue is so long and your priority so low that you'll wait for days.

The only way to know is to examine the queue or just submit your jobs. Don't assume that
100% utilization means "I might as well give up" because that is very likely incorrect.
Submit your jobs and hope for the best.